Is Obsidian found in Pennsylvania?

Related questions

1. Is green obsidian rare?
2. Why is obsidian so sharp?
3. What can you make with Obsidian?
4. Where is Onyx found?
5. What is obsidian made of?
6. Does Obsidian need to be cleansed?
7. Is Obsidian dangerous?
8. Is Obsidian the sharpest known material?
9. How do you clean Obsidian?
10. Can you polish Obsidian?

Tags

1. #known
2. #volcanism
3. #however
4. #pictured
5. #produced
6. #region
7. #amounts
8. #pittsburgh
9. #steel
10. #found
11. #pennsylvania
12. #eruptions
13. #obsidian
14. #state
15. #these
16. #smelting
17. #above
18. #anthropogenic
19. #large